Some time ago I made a project to play music via a “list of playlists” on a headless Raspberry Pi 4 running Debian 10.8 with GStreamer 1.14.4. I compiled and installed gstd, and my program constructed pipeline commands to send via TCP. Everything worked great!
Now, when trying to re-do this on the same hardware using Debian 12.9 with GStreamer 1.22.0, I can’t get past some of the basics. One difference I should mention is that the new project includes output to Bluetooth headphones.
Using…
$ aplay /home/pi/Ring01.wav
… outputs on HDMI
Using…
$ aplay -D bluealsa /home/pi/Ring01.wav
… outputs on headphones
I believe this means that the hardware is capable of audio output to either device.
I then make the Bluetooth headphones the default audio by creating ~/.asoundrc.
Now using…
$ aplay /home/pi/Ring01.wav
… outputs on headphones
$ aplay -D hdmi:CARD=vc4hdmi0,DEV=0 /home/pi/Ring01.wav
Playing WAVE ‘/home/pi/Ring01.wav’ : Signed 16 bit Little Endian, Rate 22050 Hz, Stereo
Warning: rate is not accurate (requested = 22050Hz, got = 32000Hz)
please, try the plug plugin
… outputs on HDMI with a warning
Moving on to GStreamer…
Trying this fails outright…
$ gst-launch-1.0 filesrc location=/home/pi/Kryptonite.mp3 ! mpegaudioparse ! mpg123audiodec ! audioconvert ! audioresample ! autoaudiosink
Setting pipeline to PAUSED …
Pipeline is PREROLLING …
AL lib: (EE) ALCplaybackAlsa_reset: snd_pcm_hw_params(self->pcmHandle, hp) failed: File descriptor in bad state
ERROR: from element /GstPipeline:pipeline0/GstAutoAudioSink:autoaudiosink0/GstOpenALSink:autoaudiosink0-actual-sink-openal: Unable to prepare device.
Additional debug info:
…/ext/openal/gstopenalsink.c(861): gst_openal_sink_prepare (): /GstPipeline:pipeline0/GstAutoAudioSink:autoaudiosink0/GstOpenALSink:autoaudiosink0-actual-sink-openal:
ALC error: Invalid Device
ERROR: pipeline doesn’t want to preroll.
Setting pipeline to NULL …
Freeing pipeline …
Trying this looks like it starts, then immediately fails…
$ gst-launch-1.0 playbin3 uri=file:///home/pi/Kryptonite.mp3
Setting pipeline to PAUSED …
Pipeline is PREROLLING …
D: bluealsa-pcm.c:1309: Getting BlueALSA PCM: PLAYBACK 00:16:94:0C:4A:81 a2dp
D: bluealsa-pcm.c:1062: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Setting constraints
D: bluealsa-pcm.c:443: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Closing
D: bluealsa-pcm.c:1309: Getting BlueALSA PCM: PLAYBACK 00:16:94:0C:4A:81 a2dp
D: bluealsa-pcm.c:1062: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Setting constraints
D: bluealsa-pcm.c:532: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Initializing HW
D: bluealsa-pcm.c:567: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: FIFO buffer size: 1024 frames
D: bluealsa-pcm.c:581: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Selected HW buffer: 3 periods x 4456 bytes <= 13376 bytes
D: bluealsa-pcm.c:600: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Initializing SW
D: bluealsa-pcm.c:600: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Initializing SW
D: bluealsa-pcm.c:600: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Initializing SW
D: bluealsa-pcm.c:639: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Prepared
D: bluealsa-pcm.c:600: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Initializing SW
D: bluealsa-pcm.c:639: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Prepared
D: bluealsa-pcm.c:356: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Starting
D: bluealsa-pcm.c:226: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Starting IO loop: 12
D: bluealsa-pcm.c:592: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Freeing HW
D: bluealsa-pcm.c:532: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Initializing HW
ALSA lib bluealsa-pcm.c:323:(io_thread) PCM FIFO write error: Bad file descriptor
D: bluealsa-pcm.c:161: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: IO thread cleanup
D: bluealsa-pcm.c:567: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: FIFO buffer size: 1024 frames
D: bluealsa-pcm.c:581: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Selected HW buffer: 3 periods x 4452 bytes <= 13360 bytes
D: bluealsa-pcm.c:600: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Initializing SW
D: bluealsa-pcm.c:600: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Initializing SW
D: bluealsa-pcm.c:600: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Initializing SW
D: bluealsa-pcm.c:639: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Prepared
D: bluealsa-pcm.c:600: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Initializing SW
AL lib: (EE) UpdateDeviceParams: Failed to set 44100hz, got 48000hz instead
D: bluealsa-pcm.c:639: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Prepared
D: bluealsa-pcm.c:356: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Starting
D: bluealsa-pcm.c:226: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Starting IO loop: 12
AL lib: (EE) ALCplaybackAlsa_mixerProc: Invalid state detected: No such device
Redistribute latency…
Pipeline is PREROLLED …
Setting pipeline to PLAYING …
Redistribute latency…
New clock: GstAudioSinkClock
D: bluealsa-pcm.c:231: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Pausing IO thread
Got EOS from element “playbin3-0”.
Execution ended after 0:00:01.283004348
Setting pipeline to NULL …
D: bluealsa-pcm.c:592: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Freeing HW
D: bluealsa-pcm.c:443: /org/bluealsa/hci0/dev_00_16_94_0C_4A_81/a2dpsrc/sink: Closing
Freeing pipeline …
This also fails…
$ gst-launch-1.0 playbin3 uri=file:///home/pi/Kryptonite.mp3 audio-sink=bluealsa
ERROR: pipeline could not be constructed: could not set property “audio-sink” in element “playbin3” to “bluealsa”.
Can anybody tell me what I’m doing wrong? If I can’t get the GStreamer command line tools to work, I don’t want to try gstd yet.
Thank for any insight
